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Partial Question 9 1/3 pts The accompanying table describes the results from groups of 8 births from 8 different sets of parents. The random variable x represents the number of girls among 8 children. X P(x) 0 0.0039 1 0.0313 2 0.1094 3 0.2188 4 0.2734 5 0.2188 6 0.1094 7 0.0313 8 0.0039 a) Find the mean of the number of girls in 8 births. 1 = 4 b) Find the standard deviation of the number of girls in 8 births. 0 = 0.8722 c) Find the variance of the number of girls in 8 births. o' = 5Assume that different groups of couples use a particular method of gender selection and each couple gives birth to one baby. This method is designed to increase the likelihood that each baby will be a girl, but assume that the method has no effect, so the probability of a girl is 0.5. Assume that the groups consists of 29 couples, answer the following questions. a) Find the mean for the number of girls in group of 29 births. H = 14.5 b) Find the variance for the number of girls in group of 29 births. 0 = 7.25 c) Find the standard deviation for the number of girls in group of 29 births. O = 2.69 d) Use the range rule of thumb to find the values separating results that are significantly low or significantly high. Values of 4 girls or fewer are significantly low. Values of 4.3 or greater are significantly high